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Re: [TenTec] Using an Argosy in the field

To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Subject: Re: [TenTec] Using an Argosy in the field
From: Stephen Roberts <steverob@shoreham.net>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Tue, 27 Mar 2012 22:02:47 -0400
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>
Thanks for your input John. You obviously have more experience than me. I was 
assuming a lot of CQ'ing and QSO's which would be a different story.

Sent from my iPad

On Mar 27, 2012, at 6:42 PM, John <jh.graves@verizon.net> wrote:

> Rick,
> Thanks for your comments and estimates.  It always helps if estimates 
> are based on reality.  I was thinking of trying SSB but was really 
> unsure of how I would get out on sideband.  The group I do FD with 
> generally will have at least one run for QRP contacts for their point 
> value.  If things quiet down, I could insert the Argosy and still have 
> access to the beams although with a little thought I could also use 
> whatever I wanted.  I will now have to go and look at the rules for low 
> power operation.
> I have made a few low power contacts and 50 W contacts with the Argosy 
> on my antenna here at home so it is not like I have never tried it.
> John / WA1JG
> On 3/27/2012 4:46 PM, Rick - DJ0IP / NJ0IP wrote:
>> Steve, you are way off on your assumptions.
>> Normally the TX current drain is not the biggest problem.
>> Continuous current drain is the problem.
>> I would say you will be on receive 90% of the time.
>> When talking you probably average only 30% of max current drain.
>> On transmitting CW it might be 50%, probably less.
>> But as I said, 90% of the time that the radio is switched on, it will be in
>> RX mode.
>> Important is continuous current drain:
>>  - Turn off the dial lamps (can't remember if there is a switch on that rig
>> or not; if not, install one)
>>  - Use headphones instead of speaker; that way it draws less current
>>  - Turn the radio off every chance you get (breaks for eating, etc.)
>>  - If it gets dark, use an external LED lamp to light the rig's front panel
>> (I used to use candles)
>> Run as little TX power as necessary.
>> For CW, 20w is generally enough (if you feel you have to run more than 5).
>> Running in QRP mode saves more than you think because it is more efficient
>> in that mode than when running reduced power in high power mode.  What I
>> mean is, if you switch it to QRP, it draws perhaps 800mw on TX.  If you run
>> it in high power but back the power off to , say, 10w, it doesn't draw twice
>> the current, but rather 3 or 4 times as much current.
>> I hope your Argosy is the analog version.
>> It will draw less power in receive than the digital readout version.
>> You will find that the dial lamps draw half of the total current in RX mode.
>> My Experience:  18 years of running Ten-Tec transceivers from a motorcycle
>> battery.  Transceivers used: Ten-Tec 505, 509, (both with and without the
>> 405 amp), Ten-Tec Argosy (analog), Ten-Tec Scout, and Argonaut 515.
>> You can see some photos of my setup here:
>> http://www.dj0ip.de/my-expeditions/
>> SPECIFICALLY, check out the ones to the Isle of Man, and Corsica.
>> ALSO, check out my 1979 operations from Andorra.
>> I ran a Ten-Tec Omni (analog, dial lights switched off, running @ 50w CW)
>> for 10 days off of car batteries.
>> Generally one car battery would last me an entire day, and I was on the air
>> about 16 hours per day.
>> I could recharge the battery on our generator which was located near the SSB
>> tent, about 200 meters away from the CW tent.
>> I felt like I was transmitting all the time (or so it seems when you're
>> doing it), but the reality is, you receive far more than you transmit.
>> See: http://www.dj0ip.de/my-expeditions/andorra-1979/
>> In my 1975 expedition to Andorra, we also ran off of the car battery (that's
>> all we had) but we ran the car's motor quite a lot, just to keep warm.  We
>> ran an old Swan SS-100 (well it was brand new then) with 50w out.
>> It's not a problem to run the full 50w off of the car's cigarette lighter.
>> You need to purchase a special device for this.
>> Check out the MFJ-4403 transceiver Voltage Conditioner:
>> http://www.mfjenterprises.com/Product.php?productid=MFJ-4403
>> It works.
>> You can almost always find another driver/car willing to jump start your
>> car, but they don't always have jumper cables.
>> Have fun!
>> Rick, DJ0IP
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